CHAPTER 29 PLUMBING SYSTEMS

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1 CHAPTER 29 SYSTEMS Note: The amendments to Chapter 29 are different than the 2009 Seattle Building Code and are not marked with margin bars or arrows. SECTION 2901 GENERAL [P] Scope. The provisions of this chapter and the ((International)) Uniform Plumbing Code shall govern the erection, installation, alteration, repairs, relocation, replacement, addition to, use or maintenance of plumbing equipment and systems. Toilet and bathing rooms shall be constructed in accordance with Section Plumbing systems and equipment shall be constructed, installed and maintained in accordance with the ((International)) Uniform Plumbing Code. Private sewage disposal systems shall conform to the International Private Sewage Disposal Code Health codes. In food preparation, serving and related storage areas, additional fixture requirements may be dictated by state and local health codes. SECTION 2902 MINIMUM FACILITIES [P] Minimum number of fixtures. Plumbing fixtures shall be provided for the type of occupancy and in the minimum number shown in Table Types of occupancies not shown in Table shall be ((considered)) determined individually by the building official based on the occupancy which most nearly resembles the proposed occupancy. The number of occupants shall be determined by this code. Occupancy classification shall be determined in accordance with Chapter 3. Plumbing fixtures need not be provided for unoccupied buildings or facilities. [P] Fixture calculations. To determine the occupant load of each sex, the total occupant load shall be divided in half. To determine the required number of fixtures, the fixture ratio or ratios for each fixture type shall be applied to the occupant load of each sex in accordance with Table Fractional numbers resulting from applying the fixture ratios of Table shall be rounded up to the next whole number. For calculations involving multiple occupancies, such fractional numbers for each occupancy shall first be summed and then rounded up to the next whole number. Exception: The total occupant load shall not be required to be divided in half where approved statistical data indicate a distribution of the sexes of other than 50 percent of each sex. No. CLASSIFICATION OCCUPANCY DESCRIPTION 1 Assembly (continued) [P] TABLE MINIMUM NUMBER OF REQUIRED FIXTURES a (See Sections and ) Theaters and other A-1 d buildings for the performing arts and motion pictures Nightclubs, bars, taverns, dance halls and buildings for similar A-2 d purposes A-3 d Restaurants, banquet halls and food courts Auditoriums without permanent seating, art galleries, exhibition halls, museums, lecture halls, libraries, arcades and gymnasiums Passenger terminals and transportation facilities Places of worship and other religious services WATER CLOSETS (((URINALS SEE SECTION OF THE (continued) LAVATORIES MALE FEMALE MALE FEMALE BATHTUBS/ SHOWERS ((DRINKING FOUNTAINS e, f (SEE SECTION OF THE ((OTHER)) (( 500)) (( 500)) (( 500)) (( 500)) (( 1,000)) (( 1,000)) 2012 SEATTLE BUILDING CODE 603

2 No. CLASSIFICATION OCCUPANCY DESCRIPTION 1 Assembly A-4 A-5 2 Business B 3 Educational E 4 Factory and industrial 5 Institutional F-1 and F-2 [P] TABLE (continued) MINIMUM NUMBER OF REQUIRED FIXTURES a (See Sections and ) Coliseums, arenas, skating rinks, pools and tennis courts for indoor sporting events and activities Stadiums, amusement parks, bleachers and grandstands for outdoor sporting events and activities WATER CLOSETS (((URINALS SEE SECTION OF THE LAVATORIES MALE FEMALE MALE FEMALE 75 for 1,500 and 1 per 120 for 1, for 1,500 and 1 per 120 for 1, for 1,520 and 1 per 60 for 1, for 1,520 and 1 per 60 for 1,520 Buildings for the transaction of business, professional services, other services involving 25 for 50 and 50 for the merchandise, remainder 50 office buildings, banks, light industrial and similar uses Educational facilities Structures in which occupants are engaged in work fabricating, assembly or processing of products or materials (continued) BATHTUBS/ SHOWERS ((DRINKING FOUNTAINS e, f (SEE SECTION OF THE ((OTHER)) SEATTLE BUILDING CODE for the first 80 and 80 for the remainder ((50)) (( 1,000)) (( 1,000)) (( 100)) (( 100)) See Section ((411)) of the ((International)) Uniform Plumbing Code (( 400)) I-1 Residential care (( 100)) Hospitals, ambulatory nursing home care recipient b room c room c 15 (( 100)) sink g )) (( 100)) (( )) I-2 Employees, other than residential care b Visitors, other than residential care (( 500)) (( )) I-3 Prisons b cell cell 15 (( 100)) I-3 I-4 Reformatories, detention centers and correctional (( 100)) centers b Employees b (( 100)) (( )) Adult day care and (( 100)) child day care

3 No. CLASSIFICATION OCCUPANCY DESCRIPTION 6 Mercantile M 7 Residential 8 Storage R-1 R-2 [P] TABLE continued MINIMUM NUMBER OF REQUIRED FIXTURES a (See Sections and ) Retail stores, service stations, shops, salesrooms, markets and shopping centers Hotels, motels, boarding houses (transient) Dormitories, fraternities, sororities and boarding houses (not transient) R-2 Apartment house R-3 R-3 ((R-4)) S-1 S-2 One- and two-family dwellings Congregate living facilities with 16 or fewer persons ((Congregate living facilities with 16 or fewer persons)) Structures for the storage of goods, warehouses, storehouses and freight depots, low and moderate hazard WATER CLOSETS (((URINALS SEE SECTION OF THE LAVATORIES MALE FEMALE MALE FEMALE BATHTUBS OR SHOWERS ((DRINKING FOUNTAINS e, f (SEE SECTION OF THE (( 1,000)) sleeping sleeping sleeping ((OTHER)) sink g )) (( )) (( 100)) dwelling dwelling dwelling dwelling dwelling dwelling a. The fixtures shown are based on one fixture being the minimum required for the number of persons indicated or any fraction of the number of persons indicated. The number of occupants shall be determined by this code. b. Toilet facilities for employees shall be separate from facilities for inmates or care recipients. c. A single-occupant toilet room with one water closet and one lavatory serving not more than two adjacent patient sleeping s shall be permitted where such room is provided with direct access from each patient sleeping and with provisions for privacy. d. The occupant load for seasonal outdoor seating and entertainment areas shall be included when determining the minimum number of facilities required. ((e.the minimum number of required drinking fountains shall comply with Table and Chapter 11. f. Drinking fountains are not required for an occupant load of 15 or fewer. g. For business and mercantile occupancies with an occupant load of 15 or fewer, service sinks shall not be required.)) (( )) (( )) ((1 kitchen sink per dwelling ; 1 automatic clothes washer connection per 20 dwelling s)) ((1 kitchen sink per dwelling ; 1 automatic clothes washer connection per dwelling )) (( 100)) (( 10)) (( 10)) (( 8)) (( 100)) See Section ((411)) of the ((International)) Uniform Plumbing Code (( 1,000)) 2012 SEATTLE BUILDING CODE 605

4 Private offices. Fixtures only accessible to private offices shall not be counted to determine compliance with this section Urinals. Where urinals are provided, one water closet less than the number specified may be provided for each urinal installed, except the number of water closets in such cases shall not be reduced to less than one quarter (25 percent) of the minimum specified. For men's facilities serving 26 or more persons, not less than one urinal shall be provided. [P] Family or assisted-use toilet and bath fixtures. Fixtures located within family or assisted-use toilet and bathing rooms required by Section are permitted to be included in the number of required fixtures for either the male or female occupants in assembly and mercantile occupancies. [P] Separate facilities. Where plumbing fixtures are required, separate facilities shall be provided for each sex. Exceptions: 1. Separate facilities shall not be required for dwelling s and sleeping s. 2. Separate facilities shall not be required in structures or tenant spaces with a total occupant load, including both employees and customers, of 15 or less. 3. Separate facilities shall not be required in mercantile occupancies in which the maximum occupant load is 100 or less. [P] Family or assisted-use toilet facilities serving as separate facilities. Where a building or tenant space requires a separate toilet facility for each sex and each toilet facility is required to have only one water closet, two family/assisted-use toilet facilities shall be permitted to serve as the required separate facilities. Family or assisted-use toilet facilities shall not be required to be identified for exclusive use by either sex as required by Section [P] Employee and public toilet facilities. Customers, patrons and visitors shall be provided with public toilet facilities in structures and tenant spaces intended for public utilization. The number of plumbing fixtures located within the required toilet facilities shall be provided in accordance with Section for all users. Employees shall be provided with toilet facilities in all occupancies. Employee toilet facilities shall either be separate or combined employee and public toilet facilities. Exception: Public toilet facilities shall not be required in open or enclosed parking garages. Toilet facilities shall not be required in parking garages where there are no parking attendants. [P] Access. The route to the public toilet facilities required by Section shall not pass through kitchens, food preparation areas, unpackaged food storage areas, storage rooms or closets. Access to the required facilities shall be from within the building or from the exterior of the building. Access to toilets serving multiple tenants shall be through a common use area and not through an area controlled by a tenant. All routes shall comply with the accessibility requirements of this code. The public shall have access to the required toilet facilities at all times that the building is occupied. For other requirements for plumbing facilities, see Chapter Food preparation areas. Toilet rooms shall not open directly into a room used for the preparation of food for service to the public or residents of Group R-2 boarding homes and residential treatment facilities licensed by Washington state. [P] Location of toilet facilities in occupancies other than malls. In occupancies other than covered and open mall buildings, the required public and employee toilet facilities shall be located not more than one story above or below the space required to be provided with toilet facilities, or conveniently in a building adjacent thereto on the same property, and the path of travel to such facilities shall not exceed a distance of 500 feet (152 m). Exception: The location and maximum travel distances to required employee facilities in factory and industrial occupancies are permitted to exceed that required by this section, provided that the location and maximum travel distance are approved. [P] Location of toilet facilities in malls. In covered and open mall buildings, the required public and employee toilet facilities shall be located not more than one story above or below the space required to be provided with toilet facilities, and the path of travel to such facilities shall not exceed a distance of 300 feet ( mm). In mall buildings, the required facilities shall be based on total square footage (m 2 ) within a covered mall building or within the perimeter line of an open mall building, and facilities shall be installed in each individual store or in a central toilet area located in accordance with this section. The maximum travel distance to central toilet facilities in mall buildings shall be measured from the main entrance of any store or tenant space. In mall buildings, where employees toilet facilities are not provided in the individual store, the maximum travel distance shall be measured from the employees work area of the store or tenant space. [P] Pay facilities. Where pay facilities are installed, such facilities shall be in excess of the required minimum facilities. Required facilities shall be free of charge. [P] Door locking. Where a toilet room is provided for the use of multiple occupants, the egress door for the room shall not be lockable from the inside of the room. This section does not apply to family or assisted-use toilet rooms. [P] Signage. Required public facilities shall be designated by a legible sign for each sex. Signs shall be readily visible and located near the entrance to each toilet facility. Signs for accessible toilet facilities shall comply with Section [P] Directional signage. Directional signage indicating the route to the public facilities shall be ((posted in accordance with Section Such signage shall be)) SEATTLE BUILDING CODE

5 * located in a corridor or aisle, at the entrance to the facilities for customers and visitors. [P] Drinking fountain location. Drinking fountains shall not be required to be located in individual tenant spaces provided that public drinking fountains are located within a travel distance of 500 feet of the most remote location in the tenant space and not more than one story above or below the tenant space. Where the tenant space is in a covered or open mall, such distance shall not exceed 300 feet. Drinking fountains shall be located on an accessible route. Drinking fountains shall not be located in toilet rooms Drinking fountain number. Occupant loads over 30 shall have one drinking fountain for 150 occupants, then one for each additional 500 occupants. Exceptions: 1. Sporting facilities with concessions serving drinks shall have one drinking fountain for each 1,000 occupants. 2. A drinking fountain need not be provided in drinking or dining establishments Multistory buildings. Drinking fountains shall be provided on each floor having more than 30 occupants in schools, dormitories, auditoriums, theaters, offices and public buildings Penal institutions. Penal institutions shall have one drinking fountain on each cell block floor and one on each exercise floor Dwelling s. Dwelling s shall be provided with a kitchen sink Water closet space requirements. The water closet stool in all occupancies shall be located in a clear space not less than 30 inches (762 mm) in width, with a clear space in front of the stool of not less than 24 inches (610 mm) Water. Each required sink, lavatory, bathtub and shower stall shall be equipped with hot and cold running water necessary for its normal operation SEATTLE BUILDING CODE 607

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